CRISPR-Cas9 Mechanism and Applications

CRISPR-Cas9 is a precise gene-editing tool that can modify DNA by adding, removing, or altering specific sections. It uses a protein called Cas9, which acts like molecular scissors to cut DNA at targeted sites. The system identifies malfunctioning DNA sequences with the help of guide RNA. Once the target DNA is located, Cas9 binds and cuts the DNA, allowing cellular repair mechanisms to make changes. This process can lead to permanent genetic modifications, potentially reversing disease processes.

What role does the Cas9 protein play in the CRISPR-Cas9 system?

• It serves as molecular scissors to cut DNA.

• It acts as a guide to locate DNA sequences.

• It repairs the DNA after cutting.

• It identifies malfunctioning cells.

How does the CRISPR-Cas9 system identify the target DNA sequence?

• By using a protein called guide RNA.

• By using a piece of RNA called guide RNA.

• By using a DNA sequence called guide DNA.

• By using a protein called Cas9.

What is the primary purpose of using guide RNA in the CRISPR-Cas9 system?

• To act as a molecular scissor.

• To cut the DNA at specific points.

• To repair the DNA sequence.

• To locate the target DNA sequence.

What happens after Cas9 binds to the target DNA?

• It copies the DNA sequence.

• It cuts the DNA at the malfunctioning spot.

• It repairs the DNA immediately.

• It removes the entire DNA strand.

What is the result of the DNA repair process initiated by CRISPR-Cas9?

• Reversal of all genetic mutations.

• Temporary genetic changes.

• No changes to the DNA sequence.

• Permanent genetic changes.

What is the ultimate goal of the CRISPR-Cas9 gene editing process?

• To create new DNA sequences.

• To reverse disease processes by enabling normal cell function.

• To remove all malfunctioning cells.

• To duplicate the entire DNA strand.